Coupla build on a lean-to

[Don(MI)]

Hey all,

Considering a small operational home built set up, at my own house. Thinking of setting up my small 2x4' pan (Or whatever size it ends up being) inside old garage.

Question, has anyone every attempted to build a Coupla on a lean-to roof? There would only be potentially 1 side that could aerate, Unlike a traditional 'Roof Peak' Coupla that has 2 long sides available.

My first guess is that this is not a good idea. Any ideas on how to properly vent this on a lean to? I do not want to set up this small operation, in the center of the garage as I will be using it for storage and other things. Would like to keep it off to the side, or even build a new lean-to (Just a roof) over the evaporator.

Thoughts?

Thanks!

[markct]

A hood with a pipe thru the roof would work much better i think

[maple maniac65]

a trap door that opens up might work. Some of the older designs of sugarhouses had trap doors that opened at the peak to let steam out and they also let the weather in.

[RC Maple]

You would definitely want more than 1 choice for directions to let out steam. The hood with stack does solve your issue, then the wind can blow in any direction. With only one direction to vent steam, one day - or a string of days with bad weather and wind not in your favor could make things unpleasant.

[Big_Eddy]

I'm thinking a dormer style cupola would work. Opening on 3 sides. If you hinge the flaps at the top, you can open them part way (or not at all) if you have inclement weather from one direction.

With a dormer style, you don't have a flat or vertical obstruction on the main roof slope to cause water to pool behind the cupola.

[Don(MI)]

http://img.photobucket.com/albums/v50/Fuldraw/20130212_173025_zps657177fe.jpg (http://smg.photobucket.com/user/Fuldraw/media/20130212_173025_zps657177fe.jpg.html)


This is my old garage. My thoughts too, were to add a Dormer. Or create a lean to off either side.

Will be a new roof and steel around the outside hopefully in the summer.

I am really excited about building this. We still have our main operation on another property, but this will be in my backyard. Hoping to have this backyard operation going for fall syrup (Or trying to make it).

[tcross]

couldn't you just frame up a 4 sided wall on the rafters and make a normal coupla? maybe double the rafters up that it's sitting on. it may look weird but it would be the same as traditional ones!

[blaircountysugarin85]

I have a similar set up like you are trying to do. Mine is not finished but what I came up with was basically a raised roof on top of the existing roof. Its up enough that there are 4 sides open to vent. I am not done yet but I am going to trim around the bottom with flashing and install treated 1x6's to kind of box the bottom in to keep rain from pouring into the lean to. For the open area I came across a sheet of aluminum that has a bunch of 1/2" holes punched in it that are very close together. I will install that and it will finish it off and keep the critters and debris out of my steam vent while also allowing the steam to easily escape. With the combination of the aggressive roof overhang and screen I shouldn't have any trouble. This style adds a small vent area in the rear. It isn't much but helps.

[wrushton]

The old camp had have part of the roof lifts up I would say the cut out was 4x4 the bottom was builded up about a foot that was the side that had hinges on it the top close agains the building with flashing on it it look like a dormer , when in us it pop up to the wheather but they had a pole that fit in to a post for difference heighs

[Scribner's Mountain Maple]

Don,
I like the old barn. Looks like the roof is about an 8 or 9 / 12 pitch. After looking at your picture, I think I have an easy solution that will be weather tight and simple. A regular dormer would work, but you need to do a bunch of framing to make that happen. And you have two valleys and need to flash the whole thing. A Shed dormer would be pretty easy and watertight with little work. That way you can locate it anywhere in the barn you want too. A shed dormer 3' wide from the peak down as far as you need it, located where you need it. For a simple shed dormer you could build two triangles and mount them on the roof 24" apart. use a few 2by4's to connect and strengthen the triangles together on the tops. Then Cut out old metal between triangles, Cut plywood to fit front and sides of triangles on hinges and ropes, top it with one sheet of 3' roof metal tucked up under the ridge and you're done, watertight and no need for flashing. Gives you 3 sides you can open.

If you have an 8 or 9 / 12 roof, you would want the dormer to end up at 4 or 5 /12.

Just another idea, look up shed dormer designs on the net for pictures if you are interested to see what it would look like.

Good luck,
Ben

[farmall h]

Looks like a normal cupula would work...add rafter joists on the inside and build from there up....although the ol' girl does need a tummy tuck on the sides.

[Don(MI)]

Hmmmm......

Yes I like the shed dormer design. That would work and look nice. Not sure it would work on a lean-to though.

I am kinda headed in the lean-to direction now.

I do like the roof over the hole design, that blaircountysugarin85 had.

I think that design could be modified, to incorporate a cable winch system, that allows the roof to go up or down. Down of course for the off season. Have that part made so flashing stick up from the main roof by 4-5" and the small part of the roof or "Lid" could close overtop of the flashing, maybe forming a water tight seal. Probably a lot of R&D inside of that design but it would be simple in action. I like that idea.